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About: http://www.bibsonomy.org/bibtex/2df53b932209879ca139150dc96adc513/vitelot

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type	http://swrc.ontoware.org/ontology#Article
owl:sameAs	http://www.bibsonomy.org/uri/bibtex/2df53b932209879ca139150dc96adc513/vitelot https://doi.org/10.1371/journal.pone.0129031
http://swrc.ontowa...ntology#publisher	nodeID://b941986
http://swrc.ontoware.org/ontology#author	nodeID://b941988
http://swrc.ontowa...ontology#keywords	mybook texts zipf
http://swrc.ontowa...ontology#abstract	Zipf’s law is a fundamental paradigm in the statistics of written and spoken natural language as well as in other communication systems. We raise the question of the elementary units for which Zipf’s law should hold in the most natural way, studying its validity for plain word forms and for the corresponding lemma forms. We analyze several long literary texts comprising four languages, with different levels of morphological complexity. In all cases Zipf’s law is fulfilled, in the sense that a power-law distribution of word or lemma frequencies is valid for several orders of magnitude. We investigate the extent to which the word-lemma transformation preserves two parameters of Zipf’s law: the exponent and the low-frequency cut-off. We are not able to demonstrate a strict invariance of the tail, as for a few texts both exponents deviate significantly, but we conclude that the exponents are very similar, despite the remarkable transformation that going from words to lemmas represents, considerably affecting all ranges of frequencies. In contrast, the low-frequency cut-offs are less stable, tending to increase substantially after the transformation.
http://swrc.ontoware.org/ontology#number	7
http://swrc.ontoware.org/ontology#volume	10
http://swrc.ontoware.org/ontology#month	07
http://swrc.ontoware.org/ontology#pages	1-23
http://swrc.ontoware.org/ontology#title	Zipf’s Law for Word Frequencies: Word Forms versus Lemmas in Long Texts
http://swrc.ontoware.org/ontology#date	Mon Dec 04 16:45:18 CET 2017
http://swrc.ontoware.org/ontology#year	2015
http://swrc.ontowa.../ontology#journal	PLOS ONE
http://swrc.ontowa...ogy#hasExtraField	nodeID://b941987

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